Territoby



I. B. HAMMOND. Ore-Feeder for Stamp-Mills.

No. 223,906. Patented Ian. 27, 1880.;

S WWI 1 YENT0 -g /WM BY M ATTORNEYS.

UNITED STATES PATENT OFFICE.

ISAAC B. HAMMOND, OF DEADWOOD, DAKOTA TERRITORY.

ORE-FEEDER FOR STAMP-MILLS.

SPECIFICATION forming part of Letters Patent No. 223,906, dated January 27, 1880.

Application filed April 11, 1879.

To all whom it may concern Be it known that I, ISAAC BARTON HAM- MOND, of Deadwood, in the county of Lawrence and Territory of Dakota, have invented a new and useful Improvement in Ore-Feeders for Stamp-Mills, of which the following is a specification. V

Figure 1 is a front View of my improved feeder. Fig. 2 is a vertical section of the same,

taken through the line as m, Fig. 1.

Similar letters of reference indicate correspending parts.

The object of this invention is to furnish an improved machine which shall be so constructed as to feed the ore to the mortars as it is required automatically, and which may be adjusted to feed more or less ore, as re quired.

The invention consists in the combination of a band on the cylinder, a vibratory clutchblock having pins, and a slot in which works a shoulder-pin, all as hereinafter described.

A represents the frame, and B the hopper ot' the feeder. C is a polygonal cylinder, the surface of which forms the bottom of the hopper B, and its journals revolve in bearings attached to the frame A. In the cylinder 0, at the angles between its sides, are inserted iron ribs 0, to prevent the said angles from wearing down and making the polygonal cylinder cylindrical.

D are fingers pivoted to a rod, E, attached to the forward side of the hopper B in such a position that the fingers D may close the discharge-oi'iening of the said hopper.

Upon the upper ends of the fingers D are formed outwardly-projecting arms F, which are provided with weights f, formed upon or attached to them, sufficient tokeep the ore in the hopper B, except as it is carried out by the polygonal cylinder 0. The'weights f may be replaced by equivalent springs, if desired.

To the end of the polygonal cylinder 0 is attached a band, G, upon the opposite sides of the edge of which are placed two clutchpins, h. I i

The clutch-pins h are attached to a clutchblock, H, and the rear or shoulder pin is placed in a slot in the said block, where it is supported by a key, so that it may be set forward when desired to take up the wear.

The rear end of the clutch-block H is pivoted to the lower end of a rod, I, the upper end of which is pivoted to the rear end of the arm J, the forward end of which is attached forward side of the hopper B, and to its inner end is attached, or upon it is formed, an arm, L, which projects forward into such a position that its forward end, or a rod attached to or resting upon its forward end, may be struck by the tappet of the stamp-stem to cause the clutch H h to clamp the hand G and turn the polygonal cylinder forward to feed the ore to the mill.

The arms J L and rock-shaft K form a bent lever, and are so arranged that it will not be struck and operated by the tappet of the stampstem while there is sufficient ore in the mortars; but when the ore gets low in the mortars the stamps will descend lower, and will operate the cylinder 0 to feed more ore into the said mortars, so that they will be supplied with ore automatically, as required, and

will thus be keptfrom becoming clogged.

The clutch H h may be so formed as to grasp both edges of the band G, and from it is suspended a weight, M, to draw it down when the arm L is released from the tappet of the stamp-stem, so that it will be ready to again turn the cylinder 0 when required.

If desired, the polygonal cylinder G c and the weighted fingers D F fmay be replaced by some other feeding device-as, for instance, with a revolving disk or an endless belt; but the device herein described is preferred.

N is a crank or hand-screw working in a nut, 0, attached to the frame A in such a position that the forward end of the said screw may be directly below the clutch-block H, so that by adjusting the said screw the downward movement of the clutch may be regulated as desired, to regulate the amount of movement of the polygonal cylinder 0 c as it is fed forward, and thus regulate the amount of ore fedto the stamp-mill at each movement of the said cylinder.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- The combination, with band G on cylinder 0, of the vibratory weighted clutch-block H, having pins h, and a slot in which the shoulder-pin works, as shown, and for the purpose specified;

ISAAC B. HAMMOND.

Witnesses:

JOHN H. BURNS, L. (J. SPARKMAN. 

